Example of vertical alignment for UITextView content.Implemented as a category over UITextView.The reason to choose a category over subclassing is so that legacy code could be easily tweaked.This hack was inspired by the following blog post: http://www.macbaszii.com/2012/10/ios-dev-uitextview-vertical-alignment.html?q=vertical

UITextView+VerticalAlignment.h

//
//  UITextView+VerticalAlignment.h
//  VerbalShoppingList
//
//  Created by Tom Susel on 1/9/14.
//

#import <UIKit/UIKit.h>

@interface UITextView (VerticalAlignment)

- (void)alignToTop;

/**
  Client should call this to stop KVO.
*/
- (void)disableAlignment;

@end

UITextView+VerticalAlignment.m

//
//  UITextView+VerticalAlignment.m
//  VerbalShoppingList
//
//  Created by Tom Susel on 1/9/14.
//

#import "UITextView+VerticalAlignment.h"

@implementation UITextView (VerticalAlignment)

- (void)alignToTop {
    // Get a message whenever the content size changes
    [self addObserver:self forKeyPath:@"contentSize" options:NSKeyValueObservingOptionNew context:NULL];
}

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {
    // When content size change, make sure the content is positioned at the top of the scroll view.
    self.contentOffset = CGPointMake(0.0f, 0.0f);
}

- (void)disableAlginment {
     [self removeObserver:self forKeyPath:@"contentSize"];
}
@end

Have tried using this code.
I have a doubt on where to use the method disableAlignment, since I have a UITextView as a part of custom UITableViewCell.
I'm using the alignToTop method in cellForRowAtIndexPath while configuring the cell.

Thanks!